Development of an experimental optoelectronic device to study the amplitude of mandibular movements

Abstract

This study aimed to present a wireless mandibular motion tracking device and optoelectronic data acquisition system developed to analyze the real-time spatial motion of the entire mandible during mouth opening and closing with no restriction of any movement. The procedures were divided into three phases: confection of a kinematic arch, dynamic digital video image acquisition, and image processing and analysis by using graphic computation. Four sequences of jaw opening/closing movements were recorded in lateral view: two from the maximum intercuspation (MIC) and the other two from a forced mandibular retruded position. Jaw motion was recorded by a digital video camera and processed as spatial coordinates corresponding to the position variation of the markers in the kinematic arch. The results showed that the method was capable of recording and processing the dynamics of the mandibular movements during jaw opening/closing using pixel-magnitude points. The mandible showed points with less displacement located near the temporomandibular joint during the opening/closing movements from the mandibular retruded position. When the jaw movements were recorded from MIC, these points were located near the mandibular foramen.

A Method of Three-Dimensional Recording of Mandibular Movement Based on Two-Dimensional Image Feature Extraction

“…While inertial technology is typically unaffected by external interference, it is also typically applied to the measurement of large object movement and is therefore not suitable for oral medical application. While ultrasonic technology can be used to study mandibular movement with high accuracy [ 12 ], other methods, such as X-ray measurement, may be too harmful or may otherwise be inappropriate for this application [ 13 ].…”

Centros instantâneos de rotação mandibular por meio de processamento de imagem obtida por metodologia optoeletrônica

“…Pela análise dos deslocamentos no plano horizontal, ou seja, no eixo Y, o ponto P1 sofreu um pequeno deslocamento de cerca de 1,0 mm de lateral para medial e o ponto P3, no mesmo sentido, de cerca de 1,5 mm. Miluzzi (1977), Baragar e Osborn (1984), Zhang et al (1995), Lindauer et al (1995), Missaka (2008), Khonsari et al (2003). Moss (1983) Khonsari et al (2003).…”